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hhtg1968
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Joined: 25/05/2023
Location: Germany
Posts: 288

Posted: 09:45pm 31 Oct 2026

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3 videos from cmm2 and pico computer (mmbasic7)

1.
both computer are calculating kind of cellular automaton. algorithm in basic, many if and thens per pixel. picomite ist twice as fast. source code is the same.

video at youtube:

pico is left - cmm2 is right

2. changed demo from matherp for the ray command:
resolution 640x480
same source
cmm2 not in picomite mode
cmm2 is fast and smooth
picomite is slower

video picomite:

ray - picomite

video cmm2:

ray - cmm2

Mixtel90

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Joined: 05/10/2019
Location: United Kingdom
Posts: 9287

Posted: 08:22am 01 Nov 2026

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I think this is sort of what I expected. I'm not sure about test 1, but in test 2 the CMM2 has dedicated high speed RAM for the video. The PicoMite has to make do with ordinary RAM which, although on-chip, isn't particularly high speed.

I assume that the Pico is a PC3 using HDMI? That may also introduce an overhead over using VGA, I don't know.

The two systems are very different in terms of hardware, even if they are both running similar MMBasic.

Just for giggles, try the Pico with the compiler on if you can. :)

Mick

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matherp
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Joined: 11/12/2012
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Posts: 12101

Posted: 09:33am 01 Nov 2026

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Please post the cellular automation code so I can use it to test. I suspect the difference is that one of the commands is waiting for frame blanking in the CMM2 and not in the Picomite

hhtg1968
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Joined: 25/05/2023
Location: Germany
Posts: 288

Posted: 07:13pm 01 Nov 2026

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ok.

picomite version:
picomite-lifepx.bas.zip

cmm2 version:

cmm2-lifepx.bas.zip

hhtg1968
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Joined: 25/05/2023
Location: Germany
Posts: 288

Posted: 07:15pm 01 Nov 2026

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@mick:

yes I use the pc3 hdmi version (with hdmi to dvi cable at 4:3 screen).

hhtg1968
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Joined: 25/05/2023
Location: Germany
Posts: 288

Posted: 07:57am 02 Nov 2026

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I updated my cmm2 to 7.00.00b5.

Now the cmm2 is faster than the picomite.

hhtg1968
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Joined: 25/05/2023
Location: Germany
Posts: 288

Posted: 08:05am 02 Nov 2026

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I updated my pc3 to rc7.

it runs faster than before but not as fast as the cmm2.

Mixtel90

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Posted: 11:21am 02 Nov 2026

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That's only to be expected.
The M series are Microcontroller cores. There are other peripherals on the chip.

Pico: Arm Cortex-M33 - blend of real-time determinism, efficiency and security
CMM2: ARM Cortex-7 - the highest-performance branch for advanced real-time applications.

Mick

Zilog Inside! nascom.info for Nascom & Gemini

hhtg1968
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Joined: 25/05/2023
Location: Germany
Posts: 288

Posted: 08:06pm 02 Nov 2026

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@matherp

you wrote in the comments to b5 that in the last rc more commands are compiled.

perhaps that is the reason for cmm2 to run faster now.
Edited 2026-11-03 06:07 by hhtg1968

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